On the track, we are running 4k to redline constantly. The peripherals, especially the power steering pump doesn't like this. I intalled the RSS pulley and shaved off just enough of the boss so that it would clear. Extra HP? Not sure but if I can reduce equipment failures when I'm at the track, it's an easy mod. If you don't track it, don't bother.
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James now has: 2008 987S 6 speed
Crashed: 2010 987.2 pdk in speed yellow! 
Sold to a cool racer chick: 2004 986 S
YouTube channel: the PORSCHE as seen by NewArt
www.youtube.com/channel/UCohdrH2xHTklM1thxk0KKOQ?
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